A multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray paper and preparation method thereof

Abstract

The present invention relates to a multi-channel three-dimensional color glare laser anti-counterfeiting aluminum-sprayed paper and a preparation method thereof, wherein the aluminum-sprayed paper comprises a base paper layer, a first adhesive layer, a metal aluminum-plated layer, a 135-degree channel holographic laser layer, a reverse color molded coating, a second adhesive layer, a zinc sulfide medium layer, a 45-degree channel holographic laser layer and a color molded coating, which are compounded in sequence from bottom to top. Compared with the prior art, the present invention has color glare and multi-channel three-dimensional laser as well as anti-counterfeiting and environmental protection effects on one packaging material, so that the packaging material can have multiple functions of practicality, beauty and anti-counterfeiting, and promote the development and innovation of the packaging industry.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging materials and relates to a multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray paper. Background Art

[0002] Aluminum-sprayed transfer paper, which has appeared in recent years, has been widely used in the packaging of various cosmetics, tobacco, food, etc. due to its metallic luster and various laser anti-counterfeiting effects. However, with the continuous improvement of people's aesthetic taste, ordinary full-page laser effects or gold and silver cardboard can no longer catch the attention of consumers, and ordinary full-page lasers no longer have an anti-counterfeiting effect. Therefore, various companies hope that the packaging of their products can have a novel appearance that quickly attracts the attention of consumers. This packaging material has the advantages of metallic texture, strong anti-counterfeiting, and gorgeous laser effects, which can promote the further development of food packaging materials in a high-level and diversified direction. The present invention is proposed based on the above problems. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray paper and a preparation method thereof.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] One of the technical solutions of the present invention provides a multi-channel three-dimensional color glare laser anti-counterfeiting aluminum-sprayed paper, including a base paper layer, a first adhesive layer, a metal aluminum-plated layer, a 135-degree channel holographic laser layer, a reverse color molded coating, a second adhesive layer, a zinc sulfide medium layer, a 45-degree channel holographic laser layer and a color molded coating, which are compounded in sequence from bottom to top.

[0006] Furthermore, the first adhesive layer is a water-based transfer adhesive layer.

[0007] Furthermore, the thickness of the metal aluminum plating layer is 380 to 480 angstroms.

[0008] Furthermore, the second adhesive layer is a solvent-free adhesive layer.

[0009] Furthermore, the thickness of the zinc sulfide dielectric layer satisfies: its characteristic transmittance is 64-66%.

[0010] Further, the opposite color molded coating and the color molded coating have opposite colors. Preferably, the opposite color molded coating and the color molded coating are both acrylic paint layers.

[0011] The metal aluminum-plated layer and the zinc sulfide medium layer serve to set off the holographic laser anti-counterfeiting layer, making the aluminum-sprayed paper appear metallic and decorative; the 135-degree channel holographic laser layer and the 45-degree channel holographic laser layer pass through two holographic laser channels at different angles. Through their synergistic effect, different laser holographic anti-counterfeiting effects can be seen when observed at different angles. At the same time, different laser holographic patterns can also be hidden at different angles, thus achieving an anti-counterfeiting effect; the color embossed coating and the opposite color embossed coating work together to make the color glare non-monotonous. At the same time, due to the certain distance between the upper and lower coatings, a colorful glare effect can be produced through the diffraction of light.

[0012] The second technical solution of the present invention proposes a method for preparing the multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray paper as described above, comprising the following steps:

[0013] (1) Pre-fabricate 45-degree channel holographic laser plates and 135-degree channel holographic laser plates for laser molding machines;

[0014] (2) taking a base film, coating a reverse color mold coating layer on the surface of the base film, drying and curing the base film to form a holographic reverse color coating film;

[0015] (3) performing laser holographic embossing on the holographic reverse color coating film on a laser embossing machine, recording the 135-degree channel holographic laser layer on the reverse color embossing coating layer of the holographic reverse color coating film, and forming a 135-degree channel color laser holographic film;

[0016] (4) using vacuum evaporation to deposit a metal aluminum layer on the surface of the 135-degree channel color laser holographic film;

[0017] (5) Continue to coat the first adhesive layer on the surface of the metal aluminum-plated layer, and adhere the front side of the base paper layer to the first adhesive layer to form an aluminum-plated composite color aluminum-sprayed paper with a 135-degree channel holographic laser anti-counterfeiting pattern;

[0018] (6) peeling off the base film layer on the aluminized composite color aluminum-sprayed paper with a 135-degree channel holographic laser anti-counterfeiting pattern and recycling it to obtain an aluminized composite color aluminum-sprayed paper with a 135-degree channel holographic laser anti-counterfeiting pattern;

[0019] (7) coating the surface of the peeled and recycled base film layer with a color mold coating layer again to obtain a holographic color coating film;

[0020] (8) performing laser holographic embossing on the holographic color coating film on a laser embossing machine, recording the 45-degree channel holographic laser layer on the color embossing coating layer, and forming a 45-degree channel color laser holographic film;

[0021] (9) using a vacuum evaporation method to evaporate zinc sulfide on the surface of the 45-degree channel color laser holographic film to obtain a zinc sulfide dielectric layer with a high-brightness laser holographic pattern;

[0022] (10) coating a second adhesive layer on the surface of the zinc sulfide dielectric layer, and at the same time laminating an aluminum-plated composite color aluminum-sprayed paper having a 135-degree channel holographic laser anti-counterfeiting pattern, thereby forming a multi-channel three-dimensional color glare laser anti-counterfeiting aluminum-sprayed composite paper;

[0023] (11) After the top base film layer of the multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray composite paper is peeled off, it is rolled or cut into single sheets to obtain the multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray paper.

[0024] Furthermore, in step (3), the molding temperature is 150-170° C., and the molding speed is 45-50 m / min.

[0025] Furthermore, in step (5), the first adhesive layer is made of water-based environmentally friendly transfer glue, which is applied by an anilox roller with a glue amount of 4 to 6 g / m 2 .

[0026] Furthermore, in step (5), the multilayer material of the composite base paper layer is first dried in an oven at 80-120°C, and then placed in a constant temperature and humidity chamber at 20-25°C and a humidity of 40-55% HR for 8-12 hours of equilibrium maturation to obtain an aluminum-plated composite color aluminum-sprayed paper with a 135-degree channel holographic laser anti-counterfeiting pattern.

[0027] Furthermore, in step (8), the molding temperature is 150-160° C., and the molding speed is 35-40 m / min.

[0028] Furthermore, in step (1), a laser holographic master of a hologram is produced on the same holographic plate by changing the width and angle of the interference fringes and adopting the local focus arc walking position lithography method, and two holographic laser plates are produced respectively through 45 degree and 135 degree channels. The production of laser plates through 45 degree and 135 degree channels is to produce two laser plates at two angles respectively, and the laser plate is a single angle, which is a prior art known in the art.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] (1) The packaging material has colorful glare, multi-channel three-dimensional laser, and anti-counterfeiting and environmental protection effects at the same time. Therefore, the packaging material can have multiple functions of practicality, beauty and anti-counterfeiting, promoting the development and innovation of the packaging industry.

[0031] (2) By providing a color molded coating and an opposite color molded coating, and making the colors of the pigments added to the two coatings opposite colors, a color glare is presented after the molded superposition, and the production method is ingenious. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1It is a structural schematic diagram of the present invention;

[0033] Figure 2 This is a state diagram of the second peeling of the base film layer during the preparation process of aluminum spray paper;

[0034] Figure 3 This is a state diagram of the first peeling of the base film layer during the preparation process of aluminum spray paper;

[0035] Description of the markings in the figure:

[0036] 1 is the base paper layer, 2 is the water-based transfer adhesive layer, 3 is the metal aluminum-plated layer, 4 is the 135-degree channel holographic laser layer, 5 is the reverse color embossed coating, 6 is the solvent-free adhesive layer, 7 is the zinc sulfide medium layer, 8 is the 45-degree channel holographic laser layer, 9 is the color embossed coating, and 10 is the base film layer. DETAILED DESCRIPTION

[0037] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0038] The present invention proposes a multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray paper, the structure of which is shown in Figure 1 As shown, it includes, from bottom to top, a base paper layer 1, a first adhesive layer, a metal aluminum-plated layer 3, a 135-degree channel holographic laser layer 4, a reverse color embossed coating 5, a second adhesive layer, a zinc sulfide medium layer 7, a 45-degree channel holographic laser layer 8 and a color embossed coating 9.

[0039] In a specific embodiment of the present invention, the first adhesive layer is a water-based transfer adhesive layer 2 .

[0040] In a specific embodiment of the present invention, the thickness of the metal aluminum plating layer 3 is 380 to 480 angstroms.

[0041] In a specific embodiment of the present invention, the second adhesive layer is a solvent-free adhesive layer 6 .

[0042] In a specific embodiment of the present invention, the thickness of the zinc sulfide dielectric layer 7 satisfies: its characteristic transmittance is 64-66%.

[0043] In a specific embodiment of the present invention, the opposite color embossed coating 5 and the color embossed coating 9 have opposite colors. Preferably, the opposite color embossed coating 5 and the color embossed coating 9 are both acrylic paint layers.

[0044] The above embodiments may be implemented individually or in combination of any two or more.

[0045] The above implementation is further described below in conjunction with specific examples.

[0046] Embodiment 1:

[0047] This embodiment proposes a multi-channel three-dimensional color glare laser anti-counterfeiting aluminum paper, the structure of which is shown in FIG. Figure 1 As shown, it includes, from bottom to top, a base paper layer 1, a first adhesive layer, a metal aluminum-plated layer 3, a 135-degree channel holographic laser layer 4, a reverse color embossed coating 5, a second adhesive layer, a zinc sulfide medium layer 7, a 45-degree channel holographic laser layer 8 and a color embossed coating 9.

[0048] The base paper layer 1 can be made of various white cardboards, and the weight can range from 80 to 250 g / m 2 In this embodiment, the base paper layer 1 is 225g / m 2 Sun White Core White Cardboard.

[0049] The water-based transfer adhesive layer 2 is formed by coating water-based environmentally friendly transfer adhesive. Preferably, the transfer adhesive particles in this embodiment have a diameter of 0.14 microns, a solid content of 50±2%, a pH value of 6.0-8.0, a viscosity of 18-28 seconds when coated with a No. 4 cup at a temperature of 25°C, a glass transition temperature of 12 degrees, and a coating amount of 4-6 g / m 2 .

[0050] The metal aluminum plating layer 3 is made of aluminum wire with a purity of 99.9%. The aluminum wire is heated at high temperature by vacuum aluminum plating equipment, vaporized, cooled and deposited on the surface of the film to form a metal aluminum layer with a thickness of 380 to 480 angstroms.

[0051] 135-degree channel holographic laser layer 4: records the laser holographic information of the 135-degree channel interference fringe interval width, angle and different focal curvature combinations.

[0052] Conversely, the color molded coating 5: the transfer coating layer is a laser holographic transfer coating layer. In this embodiment, acrylic coating is preferably used, with a solid content of 17-19%, a softening point of 105-120°C, an acid value of 7-10 mg KOH / g, a viscosity of 17-21 seconds measured under the conditions of coating No. 4 cup and a temperature of 25°C, and a dry coating amount of 1.1-1.3 g / m 2 At the same time, 5-10% of a pigment paste having a color opposite to that of the color molded coating 9 is added to the coating.

[0053] Solvent-free adhesive layer 6: A solvent-free two-component polyurethane composite adhesive is used, the first component of which is isocyanate with a density of 1.1 to 1.2 g / m 3 , solid content is 100%, the second component curing agent is hydroxyl component, density is 1.0~1.1g / m 3, solid content is 100%, the ratio of the first component to the second component curing agent is 1:0.8~0.9, and the amount of glue is 1.0~3.0g / m 2 After compounding, the temperature is 35-40° C. and cured for 24 hours. In this embodiment, Henkel solvent-free two-component polyurethane composite adhesive is used, the first component is Liofol UR 7723-22, and the second component curing agent is UR 6029-21, both of which are products with low viscosity.

[0054] Zinc sulfide dielectric layer 7: This layer is made of block zinc sulfide, which is heated at high temperature by vacuum aluminum plating equipment to vaporize the zinc sulfide, then cooled and deposited on the surface of the film to form a zinc sulfide highlight layer. The thickness of the zinc sulfide represents a transmittance of 64-66%.

[0055] 45-degree channel holographic laser layer 8: This information layer records the laser holographic information of the 45-degree channel interference fringe interval width, angle and different focal curvature combinations.

[0056] Color embossed coating 9: This transfer coating layer is a laser holographic transfer coating layer. In this embodiment, acrylic coating is preferably used, with a solid content of 17-19%, a softening point of 105-120°C, an acid value of 7-10 mg KOH / g, a viscosity of 17-21 seconds when coating a No. 4 cup at a temperature of 25°C, and a dry coating amount of 1.1-1.3 g / m 2 At the same time, 5-10% of a pigment paste of the opposite color to the opposite color molded coating 5 is added to the coating.

[0057] In this embodiment, the method for manufacturing a multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray paper comprises the following steps:

[0058] Step 1: A laser holographic master of a hologram is produced on the same holographic plate by changing the width and angle of the interference fringes and using local focus arc walking lithography, and two holographic laser plates, namely a 45-degree holographic laser plate and a 135-degree holographic laser plate, are produced through 45-degree and 135-degree channels respectively.

[0059] Step 2: The base film layer 10 is made of a BOPET film with a thickness of 15μ. The brand can be Shandong Fuwei. The reverse color molded coating 5 is coated on the surface of the BOPET film at a coating speed of 90 to 110 m / min on a coating machine, and the film is dried and cured in an oven to form a holographic color coating film.

[0060] Step 3: The holographic color coating film is laser holographically embossed on a laser embossing machine. The embossing method adopts a single-plate hard embossing method. After laser embossing, the 135-degree channel holographic laser layer 4 is recorded on the opposite color embossing coating layer 5 to form a 135-degree channel color laser holographic film. The embossing temperature of this step is 150-170°C, and the embossing speed is 45-50m / min;

[0061] Step 4: Use a vacuum aluminum plating machine to coat high purity aluminum wire at 10 -2 ~10 -3 Under the vacuum condition of 1000 Pa, it is heated to about 1400 degrees Celsius to vaporize, and then attached to the 135-degree channel holographic laser layer 4 after cooling to form a metal aluminum-plated layer 3 with a laser holographic pattern. The thickness of the aluminum-plated layer is 380 to 480 angstroms.

[0062] Step 5: On a wet composite gantry machine, a water-based transfer adhesive layer 2 is coated on the surface of the aluminum-plated layer with a laser holographic pattern, and the front side of the base paper layer 1 is pasted on the water-based transfer adhesive layer 2. The adhesive layer uses a water-based environmentally friendly transfer adhesive and is applied by an anilox roller with an amount of 4 to 6 g / m 2 The composite multilayer material is dried in an oven at 80-120°C for 4-6 sections, and then placed in a constant temperature and humidity room at 20-25°C and 40-55% HR for 8-12 hours of equilibrium maturation to form an aluminum-plated composite color aluminum-sprayed paper with a 135-degree channel holographic laser anti-counterfeiting pattern.

[0063] Step 6: Figure 3 As shown, the base film layer 10 of the aluminized composite color aluminum-sprayed paper with a 135-degree channel holographic laser anti-counterfeiting pattern is peeled off and reused on a peeling and rewinding machine to form an aluminized color aluminum-sprayed paper with a 135-degree channel holographic laser anti-counterfeiting pattern.

[0064] Step seven, the recycled base film layer 10 is peeled off and the color molded coating 9 is coated on the surface of the BOPET film again at a coating speed of 90-110 m / min on the coating machine, and then dried and cured in an oven to form a holographic color coating film.

[0065] Step 8: The holographic color coating film is embossed by laser holography on a laser embossing machine. The embossing method adopts a medium-pressure seamless embossing method. After 45-degree holographic laser embossing, the 45-degree channel holographic laser layer 8 is recorded on the color embossing coating layer 9 to form a 45-degree channel color laser holographic film. The embossing temperature of this step is 150-160°C, and the embossing speed is 35-40m / min.

[0066] Step nine, use a vacuum aluminum plating machine to coat the block zinc sulfide at 10 -2 ~10 -3Pa, heated to about 1400 degrees Celsius to vaporize, and then cooled to adhere to the laser holographic color molded coating 9 to form a zinc sulfide medium layer 7 with a high-brightness laser holographic pattern. The thickness of the zinc sulfide represents a transmittance of 64-66%.

[0067] Step ten, on a solvent-free laminating machine, apply solvent-free glue on the zinc sulfide medium layer 7 with a 45-degree channel high-brightness laser holographic pattern to form a solvent-free adhesive layer 6, and at the same time adhere the aluminum-plated color sprayed aluminum paper with a 135-degree channel holographic laser anti-counterfeiting pattern to form a multi-channel three-dimensional color glare laser anti-counterfeiting sprayed aluminum composite paper.

[0068] Step 11: On the rewinding and stripping machine or the sheet breaking machine, see Figure 2 As shown, the top base film layer 10 of the multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray composite paper is peeled off and then cut into rolls or single sheets to form a multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray paper. The peeled base film can be reused.

[0069] The base film layer 10, the PET film used for transfer is not limited to the thickness selected in the above embodiment, but can be selected within the range of 12 to 18 μm.

[0070] The base paper layer 1 can be made of various white cardboards. The gram weight can be from 80 to 250 g / m 2 .

[0071] Comparative Example 1

[0072] Compared with Example 1, most of them are the same, except that in this comparative example, the 45-degree channel holographic laser layer 8 is also changed to a 135-degree channel holographic laser layer 4.

[0073] Comparative Example 2

[0074] Compared with Example 1, most of them are the same, except that in this comparative example, the color molded coating 9, the 45-degree channel holographic laser layer 8, the solvent-free adhesive layer 6 and the zinc sulfide dielectric layer 7 are omitted.

[0075] The packaging materials obtained from the above-mentioned Example 1, Comparative Example 1 and Comparative Example 2 are tested, and it can be known that the aluminum-sprayed paper of Example 1 can see different laser holographic anti-counterfeiting effects when observed at different angles through the synergistic effect of the dual channels. At the same time, different laser holographic patterns can be hidden at different angles, which has an anti-counterfeiting effect; and in the diffraction of light, a magical glare effect can be produced. In Comparative Example 1, the 45-degree channel holographic laser layer is also changed to a 135-degree channel holographic laser layer design, and the upper and lower layers of holographic laser information overlap to cause laser interference, and the laser information is blurred. In Comparative Example 2, the color molded coating, 45-degree channel holographic laser layer, solvent-free adhesive layer and zinc sulfide medium layer are omitted, and only a single-channel single-layer laser effect is formed, which is consistent with ordinary laser aluminum-sprayed paper.

[0076] In the above embodiments, unless otherwise specified, raw materials or processing techniques are conventional commercially available raw materials or conventional processing techniques in the art.

[0077] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray paper, characterized in that: It includes a base paper layer, a first adhesive layer, a metal aluminum-plated layer, a 135-degree channel holographic laser layer, a reverse color embossed coating, a second adhesive layer, a zinc sulfide medium layer, a 45-degree channel holographic laser layer and a color embossed coating, which are laminated in sequence from bottom to top; The first adhesive layer is a water-based transfer adhesive layer; The thickness of the metal aluminum plating layer is 380 to 480 angstroms; The second adhesive layer is a solvent-free adhesive layer; The thickness of the zinc sulfide dielectric layer satisfies: its characteristic transmittance is 64-66%; The opposite color molded coating and the color molded coating have opposite colors; The reverse color molded coating is an acrylic paint layer; The color molded coating is an acrylic paint layer.

2. The method for preparing the multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray paper according to claim 1, characterized in that: The following steps are involved: (1) Pre-fabricate 45-degree channel holographic laser plates and 135-degree channel holographic laser plates for laser molding machines; (2) taking a base film, coating a reverse color mold coating layer on the surface of the base film, drying and curing the base film to form a holographic reverse color coating film; (3) performing laser holographic embossing on the holographic reverse color coating film on a laser embossing machine, recording the 135-degree channel holographic laser layer on the reverse color embossing coating layer of the holographic reverse color coating film, and forming a 135-degree channel color laser holographic film; (4) using vacuum evaporation to deposit a metal aluminum layer on the surface of the 135-degree channel color laser holographic film; (5) Continue to coat the first adhesive layer on the surface of the metal aluminum-plated layer, and adhere the front side of the base paper layer to the first adhesive layer to form an aluminum-plated composite color aluminum-sprayed paper with a 135-degree channel holographic laser anti-counterfeiting pattern; (6) peeling off the base film layer on the aluminized composite color aluminum-sprayed paper with a 135-degree channel holographic laser anti-counterfeiting pattern and recycling it to obtain an aluminized composite color aluminum-sprayed paper with a 135-degree channel holographic laser anti-counterfeiting pattern; (7) coating the surface of the peeled and recycled base film layer with a color mold coating layer again to obtain a holographic color coating film; (8) performing laser holographic embossing on the holographic color coating film on a laser embossing machine, recording the 45-degree channel holographic laser layer on the color embossing coating layer, and forming a 45-degree channel color laser holographic film; (9) using a vacuum evaporation method to evaporate zinc sulfide on the surface of the 45-degree channel color laser holographic film to obtain a zinc sulfide dielectric layer with a high-brightness laser holographic pattern; (10) coating a second adhesive layer on the surface of the zinc sulfide dielectric layer, and at the same time laminating an aluminum-plated composite color aluminum-sprayed paper having a 135-degree channel holographic laser anti-counterfeiting pattern, thereby forming a multi-channel three-dimensional color glare laser anti-counterfeiting aluminum-sprayed composite paper; (11) After the top base film layer of the multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray composite paper is peeled off, it is rolled or cut into single sheets to obtain the multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray paper.

3. The method for preparing the multi-channel three-dimensional color glare laser anti-counterfeiting aluminum spray paper according to claim 2, characterized in that: In step (3), the molding temperature is 150-170° C. and the molding speed is 45-50 m / min; In step (5), the first adhesive layer is made of water-based environmentally friendly transfer glue, which is applied by an anilox roller with a glue amount of 4 to 6 g / m 2 ; In step (5), the multilayer material of the composite base paper layer is first dried in an oven at 80-120° C., and then placed in a constant temperature and humidity room at 20-25° C. and a humidity of 40-55% HR for 8-12 hours of equilibrium aging to obtain an aluminum-plated composite color aluminum-sprayed paper with a 135-degree channel holographic laser anti-counterfeiting pattern; In step (8), the molding temperature is 150-160° C. and the molding speed is 35-40 m / min.

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